Efficient bulk heterojunction solar cells with copolymers based on fluorene, dithienylbenzothiadiazole, and thiophene derivatives

Po I. Lee, Steve Lien Chung Hsu, Jung Feng Lee

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

Three copolymers, PFTpBt, PFbCNTpBt, and PFC6TpBt, which are based on dioctylfluorene, dithienylbenzothiadiazole, and thiophene derivatives with different functional groups, were synthesized via a Suzuki reaction. The copolymers were characterized by NMR, GPC, TGA, UVvis absorption, and electrochemical cyclic voltammetry. Thermogravimetric analysis showed that the copolymers exhibited good thermal stability. The optical, electrochemical, photovoltaic properties, and hole mobility of the copolymers were investigated and discussed. The polymer solar cell based on PFTpBt had the best performance, with a power conversion efficiency (PCE) of 2.17% under the illumination of AM 1.5, 100 mW/cm2.

Original languageEnglish
Pages (from-to)1756-1761
Number of pages6
JournalSolar Energy Materials and Solar Cells
Volume95
Issue number7
DOIs
Publication statusPublished - 2011 Jul 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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